<?php

/**
 * @package php-font-lib
 * @link    http://php-font-lib.googlecode.com/
 * @author  Fabien M�nager <fabien.menager@gmail.com>
 * @license http://www.gnu.org/copyleft/lesser.html GNU Lesser General Public License
 * @version $Id: encoding_map.cls.php 34 2011-10-23 13:53:25Z fabien.menager $
 */

/**
 * Encoding map used to map a code point to a Unicode char.
 * 
 * @package php-font-lib
 */
class Encoding_Map {

    private $f;

    function __construct($file) {
        $this->f = fopen($file, "r");
    }

    function parse() {
        $map = array();

        while ($line = fgets($this->f)) {
            if (preg_match("/^[\!\=]([0-9A-F]{2,})\s+U\+([0-9A-F]{2})([0-9A-F]{2})\s+([^\s]+)/", $line, $matches)) {
                $unicode = (hexdec($matches[2]) << 8) + hexdec($matches[3]);
                $map[hexdec($matches[1])] = array($unicode, $matches[4]);
            }
        }

        ksort($map);

        return $map;
    }

}
